Vinyl chloride polymer composition

a technology of vinyl chloride and polymer composition, applied in the field of vinyl chloride polymer composition, can solve problems such as reducing flexibility

Inactive Publication Date: 2006-05-09
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0127]As the styrene-based polymer (g), one having a structural unit derived from a styrene monomer in an amount of 10 by weight or more is preferably used. The more preferred styrene-based polymer is that having a structural unit derived from a styrene monomer in an amount of 50% by weight or more. The styrene monomer can include styrene, α-methylstyrene, p-methylstyrene, p-tert-butylstyrene, 3,4-dimethylstyrene and the like. The styrene-based polymer (g) can contain one or more of the structural units derived from such a styrene monomer.
[0128]In addition, the styrene-based polymer (g) may contain a structural unit derived from a vinyl monomer other than the above-mentioned styrene monomer. Examples of the vinyl monomer other than the styrene monomer can include ones having a cyano group such as acrylonitrile and methacrylonitrile; C1–18 alkyl esters of acrylic acid or C1–18 alkyl esters of methacrylic acid such as methyl esters, ethyl esters, propyl esters, n-butyl esters, isobutyl esters, hexyl esters, 2-ethylhexyl esters, dodecyl esters and octadecyl esters; esters of acrylic acid or methacrylic acid and a diol such as ethylene glycol, propylene glycol or butanediol; vinyl esters of a carboxylic acid having 1 to 6 carbon atoms such as acetic acid or propionic acid; unsaturated carboxylic acids such as acrylic acid, methacrylic acid and maleic acid; unsaturated dicarboxylic anhydrides such as maleic anhydride; (meth)acrylamides such as acrylamide, methacrylamide and N,N-dimethylacrylamide; maleimide; N-substituted maleimides such as N-methylmaleimide, N-ethylmaleimide, N-phenylmaleimide and N-cyclohexylmaleimide; conjugated dienes such as butadiene and isoprene; and so on. The styrene-based polymer (g) may contain one or more of the structural units derived from such a vinyl monomer.
[0129]The olefin-based polymer (h) includes homopolymers of an olefin such as ethylene, propylene or butylene; copolymers of two or more of the above-mentioned ole

Problems solved by technology

However, such a soft polyvinyl chloride composition, which contains a liquid plasticizer, has a problem of the reduced flexibility and the embritt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

referential example 1

[0215]100 parts by weight of the TPU and 100 parts by weight of the F-SEEPS were premixed. The resulting mixture was melt-kneaded using a twin-screw extruder [“BT-30”, trade name, made by Research Laboratory of Plastics Technology Co., Ltd.; 30 mm φ; L / D=36] with coaxial screws, under the conditions of a cylinder temperature of 220° C. and a screw rotation speed of 150 rpm. The reaction mixture in melt was continuously extruded into water as a strand, and the resulting strands were cut in pellets with a palletizing machine. The resulting pellets were dried at 80° C. for 4 hours to give a block copolymer compound A [PU-SEEPS Compound A].

[0216]From the block copolymer composition A [PU-SEEPS Compound A], the polyurethane contained therein was extracted with dimethylformamide; and thereafter, the SEEPS-1 and the unreacted SEEPS-OH were extracted with cyclohaxane. The remaining solid was dried to give a block copolymer. 1H-NMR analysis showed that the block copolymer was a di-block copo...

example 1

[0219]The PU / SEEPS was molten at 140° C. under nitrogen with a kneading machine [“Labo Plastomill 20R200”, trade name, made by Toyo Seiki Seisaku-sho Ltd]. To the resulting melt, the PVC was blended in an amount shown in Table 1. The resulting blend was melt-kneaded at a temperature of 140° C. and a mill rotation speed of 40 rpm under nitrogen for 5 minutes to give a vinyl chloride polymer composition.

[0220]By using the obtained vinyl chloride polymer composition, a molded article [test piece] and a laminate structure were prepared. Then the various properties of the molded article and the adhesion strength in the laminate structure were measured and evaluated according to the above-described methods. Results are shown in the Table 1.

example 2

[0223]The block copolymer compound A [PU-SEEPS Compound A] obtained in the Referential Example 1 was molten at 140° C. under nitrogen with a kneading machine [“Labo Plastomill 20R200”, trade name, made by Toyo Seiki Seisaku-sho Ltd]. To the resulting melt, the PVC was blended in an amount shown in Table 1. The resulting blend was melt-kneaded at a temperature of 140° C. and a mill rotation speed of 40 rpm under nitrogen for 5 minutes to give a vinyl chloride polymer composition.

[0224]By using the obtained vinyl chloride polymer composition, a molded article [test piece] and a laminate structure were prepared. Then the various properties of the molded article and the adhesion strength in the laminate structure were measured and evaluated according to the above-described methods. Results are shown in the Table 1.

[0225]

TABLE 1ComparativeExamplesExamples1212Composition [Part by weight]PVC60505050PU / SEEPS40PU-SEEPS Compound A50F-SEEPS50SEPS50Properties of themolded articleHardness [Shore...

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Abstract

The present invention provides a vinyl chloride polymer composition which comprises (i) a vinyl chloride polymer (a) and (ii) a block copolymer (b) having a polymer block (I) comprising of a block copolymer, which may be hydrogenated, of an aromatic vinyl compound polymer block and a conjugated diene polymer block, and a polymer block (II) of a polyurethane, in a specific weight ratio. The vinyl chloride polymer composition of the present invention has non-tackiness, excellent handling properties, favorable flexibility and mechanical properties, and favorable melt-adhesiveness to other materials, and shows no migration of the component serving as a plasticizer. The vinyl chloride polymer composition of the present invention can be applied for various uses such as a production of various molded articles and a production of a laminated structure with other materials.

Description

TECHNICAL FIELD[0001]The present invention relates to a vinyl chloride polymer composition. The vinyl chloride polymer composition of the present invention has non-tackiness, excellent handling properties, favorable flexibility and mechanical properties. In addition, it has favorable melt-adhesion to other materials, and shows no migration of the component serving as a plasticizer. Therefore, the vinyl chloride polymer composition of the present invention is effectively applied for various molded articles taking advantages of these characteristics.BACKGROUND ART[0002]A vinyl chloride resin is low-cost, suitable for general purpose and applied for various uses such as hard plates, hard mold products, water and sewerage pipes, valves and joints. Further, various modification methods of a vinyl chloride resin are also known.[0003]For example, a soft polyvinyl chloride composition prepared by blending polyvinyl chloride with a liquid plasticizer such as a phthalic acid ester derivative ...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L53/02C08L75/04C08G18/08C08G18/42C08L53/00C08L91/00
CPCC08G18/0895C08G18/4238C08L27/06C08L75/04C08L27/04C08L53/00C08L2205/035C08L91/00C08L2205/02C08L2205/03C08L53/02C08L2666/24C08L2666/14C08L2666/02C08L2666/06C08L2666/04C08J5/00C08L23/16
Inventor SAITO, HIDEKAZU
Owner KURARAY CO LTD
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